Mitsubishi Air Conditioner All Error Codes And Solution | Mitsubishi Error Code
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all error code list,
A6 - Communication error with communication processor.
EA - Miss-wiring/loose inter – connecting cables. Noise interference.
EB – Miss - wiring/loose interconnecting cables.
EC - Start-up time over. The unit has failed to initialize after power up.
ED - Serial communication error.
EF - Non-defined error code. Noise interference - power down outdoor unit for 30 seconds then switch back on.
E0 - Remote controller communication error - check wiring, connections and commas voltage.
E1 - Remote controller issue -check wired to master indoor only.
E2 - Remote controller issue check wired to master indoor only.
E3 - Remote controller issue - not transmitting check wired to master indoor only.
E4 - Remote controller issue - n, check wired to master indoor only.
E5 - Remote controller issue, check wired to master indoor only.
E6 - Indoor/outdoor communication error.
E7 - Commas fault between I/C and O/C –check for condensate pump at I/C, reset power to O/C, check 12/24Vdcon S2 and S3 possible I/C board failure.
E8 - Commas failure indoor to outdoor (S2/S3) - check pumps wired in, check indoor isolator and re-power in the correct sequence i.e. indoor then outdoor
E9 - Commas failure indoor to outdoor (S2/S3) - check pumps wired in, check indoor isolator and re-power in correct sequence i.e. indoor then outdoor.
FA - 51CM connector open.
F1 - Reverse phase detection.
F2 - L3 phase open - check power supply, also check for open circuit protection devices.
F3 - 63L open - check low pressure switch for disconnection or contact failure.
F4 - 49C open - compressor inner thermostat for open circuit or contact failure.
F5 - 63H open - check high pressure switch for disconnection or contact failure.
F7 - faulty outdoor board.
F8 - outdoor board defective.
P1 - Return air thermistor fault (TH1).
P2 - Liquid pipe thermistor fault (TH2) check if TH2 disconnected or open or close circuit.
P4 - Drain sensor fault.
P5 - High condensate level - drain pump Failure.
P6 - reduced air flow through indoor coil. Dirty filters. Fan motor problem. Blockage.
P8 - mainly caused by refrigerant leakage.
P9 - TH5 condenser/evaporator thermistor open.
U1 - outdoor fan failure, blocked coil, blockage in the system, blocked filters on indoor in heating.
U2 - compressor over heating due to lack of refrigerant.
U3 - Discharge thermistor fault.
U4 - Outdoor thermistor fault.
U5 - Inverter heat sink temperature too high (TH8).
U6 - Compressor over current.
U7 - Low discharge superheat.